Crescimento de mudas de pupunheira em função da relação fósforo e cloro.

Abstract

The interaction of phosphorus and chlorine seems to be very complex because in some cases the availability of P increases with increasing Cl concentrations, in others it decreases or is not affected. The objective of this experiment was to determine the effect of different ratios of P and Cl on growth of peach palm (Baciíris gasipaes H.B.K.) seedlings. The experiment was developed in nutritive solution under greenhouse conditions. A randomized block experimental design with nine treatments (P/CI ratios) and four replications was used. The P/CI ratios were 0.00/1.50; 0.25/ 1.25; 0.50/1.00; 0.75/0.75; 1.00/0.50; 1.25/0.25; 1.50/0.00; 1.00/1.00; and 2.00 mmol.L-1/1.00 mmol L-1. The 1.00/1.00 and 2.00/1.00 ratios were defined as additional treatments. Height, stem perimeter, leaf area, dry matter of the leaves, stipes and roots were determined. The growth of seedlings was affected by the different P/CI ratios in the solution. The P/CI ratios with P concentrations starting at 1.0 mmol L" showed the highest mean values for stem perimeter, leaf area, total dry matter, dry matter of leaves and stipes.